...Lauren T. Gill; Jessica R. Kennedy; Isaiah C. H. Box; Katie E. Marshall ABSTRACT Many intertidal invertebrates are freeze tolerant, meaning that they can survive ice formation within their body cavity. Freeze tolerance is a fascinating trait, and understanding its mechanisms is important...

...Azadeh Tafreshiha; Sven A. van der Burg; Kato Smits; Laila A. Blömer; J. Alexander Heimel ABSTRACT Innate defensive responses such as freezing or escape are essential for animal survival. Mice show defensive behaviour to stimuli sweeping overhead, like a bird cruising the sky. Here, we tested...

... is capable of surviving exposures to cold. However, the freezing tolerance of this species had not yet been examined. Low temperature is known to alter membrane integrity in insects, but whether chilling or freezing compromises DNA integrity remains a matter of speculation. In the present study, we subjected...

... in the presence of endogenous levels of glucose suggests that increased glutathione recycling may occur as a result of passive regulation of glutathione reductase by rising levels of glucose during freezing. * Author for correspondence ( [email protected] ) Competing interests The authors declare...

... and unilateral effects are rather unlikely, as all of our injections sites were closer than 0.5 mm to the midline. Fig. 3. Mean (±s.e.m.) percent freezing of mice during (A) fear conditioning, (B) a retention test and extinction training and (C) a test on extinction memory. Groups received intra-mPFC...

...Bishwo N. Adhikari; Diana H. Wall; Byron J. Adams SUMMARY Nematodes are the dominant soil animals of the Antarctic Dry Valleys and are capable of surviving desiccation and freezing in an anhydrobiotic state. Genes induced by desiccation stress have been successfully enumerated in nematodes; however...

..., indicating that these concentrations have similar aversive properties. In a second experiment, these two concentrations were then tested for their ability to induce freezing, a species-specific defensive response. Only TMT but not butyric acid induced freezing in the rats. This supports the hypothesis...

..., France (e-mail: [email protected] ) 3 3 2008 © The Company of Biologists Limited 2008 2008 Lacerta cold hardiness mitochondria superoxide supercooling freezing Although the phenomenon of proton leakage has been considered for a long time to be an artefact...

...Gary C. Packard; Mary J. Packard SUMMARY Many physiologists believe that hatchling painted turtles ( Chrysemys picta ) provide a remarkable, and possibly unique, example of `natural freeze-tolerance' in an amniotic vertebrate. However, the concept of natural freeze-tolerance in neonatal painted...

...David A. Wharton; Gordon Goodall; Craig J. Marshall SUMMARY The relative importance of freezing tolerance and cryoprotective dehydration in the Antarctic nematode Panagrolaimus davidi has been investigated. If nucleation of the medium is initiated at a high subzero temperature (-1°C), the nematodes...

...D. A. Wharton; H. Ramløv ABSTRACT Differential scanning calorimetry (DSC) was used to determine the thermal events associated with freezing and melting of the cysts of the potato-cyst nematode Globodera rostochiensis . There were no thermal events during the cooling of dry cysts from 5 to –60 °C...

...D. A. Wharton; G. S. Allan ABSTRACT All free-living stages of the nematode parasite of sheep, Trichostrongylus colubriformis Giles, survived exposure to freezing temperatures in contact with water, with the exception of the first-stage juvenile (JI). The third-stage juvenile (J3) was the most...

..., if the native properties of the haemocyanin are at issue the effect of freezing must be carefully determined in each case. Second, the dependence of cooperative oxygen binding on the higher association states of haemocyanin was apparent in all four species. Third, since some intertidal species occasionally...